how to abort --force-all-periods in archiving? it takes impossible long! (no replies)

Hello,

i had a error in the .js tracking code and tried to import from my log files. I imported just 1 day of logs (~5k hits).
I followed [piwik.org] and set the date exactly as in the faq.

Now he is trying to archiv every site with every period for years back in time :(
After one day work he aborts:

INFO CoreConsole[2015-01-27 16:23:31] Archived website id = 2, period = year, 2327969 visits in last last6 years, 6883 visits this year, Time elapsed: 95772.945s
ERROR CoreConsole[2015-01-27 16:23:31] SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

How can is set this "working period" back to just a few days?

Also 2015_blob is giant?!


Thanks for any help!
Greetings - max